Michael Sherf

Attributable Mortality Rate for Carbapenem-Resistant Klebsiella pneumoniae Bacteremia

OBJECTIVE To determine the attributable (direct) mortality and morbidity caused by carbapenem-resistant Klebsiella pneumoniae bacteremia. DESIGN A matched retrospective, historical cohort design, using a stepwise procedure to stringently match the best control subjects to the best case subjects. SETTING A 1,000-bed tertiary-care university teaching hospital. PATIENTS Case subjects were defined as adult patients with carbapenem-resistant K. pneumoniae bacteremia during the period from October 2005 through October 2008. Control subjects were defined as patients who were very similar to case subjects except that they did not have bacteremia. METHODS Matching potential control subjects to case subjects was performed at a 1:1 ratio using a computerized record system. The criteria used included same hospitalization period, similar Charlson comorbidity index, same underlying disease, same age within 10 years, and same sex. Demographic and clinical characteristics were collected from medical records. RESULTS During the study period, 319 patients developed an infection due to carbapenem-resistant K. pneumoniae. Of these 319 patients, 39 (12.2%) developed a bloodstream infection, for an overall rate of 0.59 episodes of carbapenem-resistant K. pneumoniae bacteremia per 10,000 patient-days. We excluded 7 patients from our study, leaving a total of 32 case subjects in our cohort. Case subjects were significantly more likely than control subjects (n = 32) to require care in an intensive care unit (12 case subjects [37.5%] vs 3 control subjects [9.4%]), ventilator support (17 case subjects [53.1%] vs 8 control subjects [25%]), and use of a central venous catheter (19 case subjects [59.4%] vs 9 control subjects [28.1%]). For case subjects, the crude mortality rate was 71.9% (ie, 23 of the 32 case subjects died); for control subjects, the crude mortality rate was 21.9% (ie, 7 of the 32 control subjects died) (P < .001. For case subjects, the attributable mortality was 50% (95% confidence interval [CI], 15.3%-98.6%). A mortality risk ratio of 3.3 (95% CI, 2.9-28.5) was found for case subjects with carbapenem-resistant K. pneumoniae bacteremia. CONCLUSIONS Patients with carbapenem-resistant K. pneumoniae require more intensive and invasive care. We have shown that the crude and attributable mortality rates associated with carbapenem-resistant K. pneumoniae bacteremia were striking.

Awareness of Osteoporosis and Compliance with Management Guidelines in Patients with Newly Diagnosed Low-Impact Fractures

Abstract: A pre-existing fracture is a strong predictor of additional osteoporotic fractures. Consequently, current guidelines emphasize the need for treating patients with existing osteoporotic fractures. The present study aimed to assess the implementation of osteoporosis guidelines in routine practice. To this end, we reviewed the hospital charts of women and men aged 50 years and older with new fractures due to low or moderate impact treated in the emergency room, orthopedic surgery and rehabilitation departments. Notation of osteoporosis as a contributing cause for the fracture, performance of screening laboratory tests for possible secondary causes and treatment recommendations were abstracted from the record. In addition, we utilized the centralized pharmacy and laboratory computerized databases of the largest health maintenance organization in the area to follow dispensation of osteoporosis drugs and performance of screening laboratory tests in the community following fracture incidents. During the corresponding periods of January and February 1998 and 1999, 183 patients aged 50 years and older with low-impact fractures were treated in the emergency room only and 113 were hospitalized. Osteoporosis was rarely mentioned in the medical documentation. During the 6 month period after the fracture incident at least 70% of the emergency room patients and 62% of the hospitalized patients received no osteoporosis drugs. However, an encouraging significant trend toward increasing use of osteoporosis drugs, both prior to and after a fracture incident, was noted between the two survey periods among the emergency room fracture patients, but not among the hospitalized patients. Calcium supplements were the most commonly used osteoporosis drug. Bisphosphonates, hormone replacement therapy, raloxifene and calcitonin were rarely prescribed. Men were less likely than women to receive treatment for osteoporosis. Systematic laboratory evaluations for secondary causes of osteoporosis were not performed. We conclude that despite extensive attempts at increasing awareness among health professionals and the public at large, osteoporosis is still rarely singled out as a problem in patients with newly diagnosed low-impact fractures, and the majority of them are not managed according to guidelines. Further studies should address specific problems in physicians’ and patients’ attitude that may account for the present situation.

Risk factors for developing clinical infection with carbapenem-resistant Klebsiella pneumoniae in hospital patients initially only colonized with carbapenem-resistant K pneumoniae.

BACKGROUND This study examined predictors of carbapenem-resistant Klebsiella pneumoniae (CRKP) colonization and risk factors for the development of CRKP infection in patients initially only colonized with CRKP. METHODS A total of 464 patients with CRKP rectal colonization (CRKP-RC) were identified. Two case-control studies were performed, one comparing risk factors for CRKP-RC in patients who did not develop CRKP infection (CRKP-IN) versus patients without CRKP-RC and CRKP-IN, and the other comparing CRKP-RC patients who did not develop CRKP-IN with those who did. RESULTS Forty-two of the 464 colonized patients developed CRKP-IN. Multivariate analysis identified the following predictors for CRKP-RC: antibiotic therapy (odds ratio [OR], 5.76; P ≤ .0001), aminopenicillin therapy (OR, 7.753; P = .004), bedridden (OR, 3.09; P = .021), and nursing home residency (OR, 3.09; P = .013). Risk factors for CRKP-IN in initially CRKP-RC-positive patients were previous invasive procedure (OR, 5.737; P = .021), diabetes mellitus (OR, 4.362; P = .017), solid tumor (OR, 3.422; P = .025), tracheostomy (OR, 4.978; P = .042), urinary catheter insertion (OR, 4.696; P = .037), and antipseudomonal penicillin (OR, 23.09; P ≤ .0001). CONCLUSIONS We suggest that in patients with CRKP-RC, a strategy for preventing CRKP-IN might include limiting antipseudomonal penicillin and carbapenem use and preventing infections by closely following compliance with infection control bundles.

An association between gestational diabetes mellitus and long-term maternal cardiovascular morbidity

Objective To investigate whether a diagnosis of gestational diabetes mellitus (GDM) is a risk factor for subsequent long-term cardiovascular morbidity. Design A population-based study. Setting Soroka University Medical Center, a tertiary centre in the southern region of Israel. Patients A cohort of women with and without a diagnosis of GDM who delivered during the years 1988–1999 with a follow-up period until 2010. Interventions A comparison of the incidence of cardiovascular morbidity. Results Of 47 909 deliveries that met the inclusion criteria, 4928 (10.3%) occurred in patients who were diagnosed with GDM. During a follow-up period of more than 10 years, compared with women who gave birth at the same time period, after adjustment for age and ethnicity, patients with GDM had higher rates of cardiovascular morbidity including non-invasive cardiac diagnostic procedures (OR=1.8; 95% CI 1.4 to 2.2), simple cardiovascular events (OR=2.7; 95% CI 2.4 to 3.1) and total cardiovascular hospitalisations (OR=2.3; 95% CI 2.0 to 2.5). In a Cox proportional hazards model, adjusted for comorbidities such as pre-eclampsia and obesity, GDM was independently associated with cardiovascular hospitalisations (adjusted HR 2.6, 95% CI 2.3 to 3). Conclusions GDM is an independent risk factor for long-term cardiovascular morbidity in a follow-up period of more than a decade.

A Multifaceted Intervention Strategy for Eradication of a Hospital-Wide Outbreak Caused by Carbapenem-Resistant Klebsiella pneumoniae in Southern Israel

OBJECTIVE To devise a local strategy for eradication of a hospital-wide outbreak caused by carbapenem-resistant Klebsiella pneumoniae (CRKP). DESIGN Quasi-experimental, before-and-after, interrupted time-series study. SETTING A 1,000-bed tertiary-care university teaching hospital. METHODS Retrospectively, all relevant data were collected from the medical records of patients with CRKP infections from May 2006 through April 2007, the preintervention period. From May 1, 2007, through May 1, 2010, the postintervention period, the intervention was applied and prospectively followed. The 5 key elements of this strategy were an emergency department flagging system, the building of a cohort ward, the eradication of clusters, environmental and personnel hand cultures, and a carbapenem-restriction policy. The demographic and clinical parameters of patients colonized by and/or infected with CRKP were collected from medical records. RESULTS A total of 10,680 rectal cultures were performed for 8,376 patients; 433 (5.16%) and 370 (4.4%) were CRKP-colonized and CRKP-infected patients, respectively, and 789 (98%) of 803 patients were admitted to the CRKP cohort ward. The CRKP infection density was reduced from 5.26 to 0.18 per 10,000 patient-days (P ≤ .001), and no nosocomial CRKP infections were diagnosed. Twenty-three percent of environmental cultures were found to be positive. Meropenem use was reduced from 283 ± 70.92 to 118 ± 74.32 defined daily doses per 1,000 patient-days (P ≤ .001). CONCLUSION This intervention produced an enormous impact on patient location, surveillance cultures, and antibiotic policies and a massive investment in infection control resources.

Health services utilization by depressive patients identified by the MINI questionnaire in a primary care setting.

Objectives To identify patients with depression, in primary care clinics in Israel, using the MINI (Mini-International Neuropsychiatric Interview) as a screening tool and to evaluate the health services utilization and costs of the patients identified. Design Phone interviews (between 1997 and 2000) and health services utilization data extracted from computerized databases. Setting Three primary care clinics belonging to Clalit Health Services (HMO). Participants A random sample of 2755 patients, aged 21–65. Main outcome measures MINI score results, utilization data. Results The study included interviews with 2507 patients. The screening questionnaire identified 5.9% with major depression, 1.6% with minor depression and 14.3% with depressive symptoms. Higher rates of depression were found among women, immigrants, secular or traditional religious Jews, and the unemployed. Those identified with major depression had higher health services utilization and costs. Logistic regression analysis showed that depression was related to older age, female gender, fewer years of education and among seculars. Depressed patients had significantly more somatic comorbidity. Conclusions Health services utilization and costs of people identified as depressed by the screening tool were higher. Depressive patients had higher comorbidity, which might be partially responsible for the higher cost.

The Incidence of Anemia in an Israeli Population: A Population Analysis for Anemia in 34512 Israeli Infants Aged 9 to 18 Months

OBJECTIVES. The purpose of this work was to use the comprehensive computerized database of Clalit Health Services to analyze the prevalence and contributing factors of anemia among the population of Clalit Health Services-insured Israeli infants aged 9 to 18 months, characterized by ethnic sector. METHODS. This was a cross-sectional retrospective study for the year 2003 using the computerized database of Clalit Health Services for 34512 infants aged 9 to 18 months insured by the Clalit Health Services sick fund. Children with abnormal white blood counts at the time of the hemoglobin test and with chronic diseases were excluded. The data were analyzed for age, infant hemoglobin level, ethnic origin, district distribution, type of clinic where the infant received treatment, the number of iron prescriptions dispensed to each child, and the mothers last hemoglobin level before giving birth. Anemia was defined as a hemoglobin level <105 g/L. RESULTS. The prevalence of anemia among Israeli infants is 15.5%. The prevalence is significantly higher in the non-Jewish population (22.5%) as compared with the Jewish population (10.5%). The lowest prevalence of anemia was found in pediatric health centers (10.7%). A significant correlation was found between the presence of anemia in infants and the presence of anemia found in their mothers. Infants with anemia used significantly less iron preparations. CONCLUSIONS. This study is one of the first studies to use a comprehensive computerized database to perform a population-based analysis of anemic infants. We found a considerable percentage of infants to be anemic and identified a specific population to be at high risk for anemia. We describe 2 factors that have the potential to be altered through intervention: improving compliance of iron intake and maternal anemia. Major national efforts should be made to minimize the prevalence of anemia, especially in the non-Jewish population, and to learn more about the causes of iron-deficiency anemia in this group. This study provides a base for an intervention study.

Placental abruption as a significant risk factor for long-term cardiovascular mortality in a follow-up period of more than a decade.

BACKGROUND To investigate the risk for subsequent cardiovascular events in women having placental abruption during a follow-up period of more than 10 years. METHODS A population-based study of the incidence of cardiovascular events in women who had placental abruption with women without placental abruption during 1988-99 and with follow-up until 2010. Associations between placental abruption and maternal long-term cardiovascular morbidity and mortality were investigated. Kaplan-Meier survival curves and multivariable Cox regression were used to estimate cumulative incidence of cardiovascular mortality. RESULTS During the study period, there were 47 585 deliveries meeting the inclusion criteria; of these, 653 occurred in patients with placental abruption. No significant association was noted between placental abruption and subsequent long-term hospitalisations because of cardiovascular causes. However, placental abruption was associated with long-term cardiovascular mortality [odds ratio (OR) = 6.6; 95% confidence interval (CI) 2.3, 18.3]. The cardiovascular case fatality rate for the placental abruption group was 13.0% vs. 2.5% in the comparison group (P < 0.001). Patients with a history of placental abruption had a significantly higher risk for cardiovascular mortality during the follow-up period (Log-rank test P = 0.017). Using Cox multivariable regression models, placental abruption remained an independent risk factor for long-term maternal cardiovascular mortality [adjusted hazard ratio (HR) = 4.3; 95% CI 1.1, 18.6). CONCLUSION Placental abruption is a significant risk factor for long-term cardiovascular mortality in a follow-up period of more than a decade.

Is preeclampsia a significant risk factor for long-term hospitalizations and morbidity?

Objective: The present study was aimed to evaluate long-term morbidity of patients with hypertensive disorders of pregnancy. Study design: A retrospective cohort study was conducted, including women who gave birth between the years of 1988 to 1998, and had a follow-up until December 2009. Data were extracted by linking a computerized database of hospitalizations with computerized database containing maternal records from the same regional medical center. The exposed group comprised 2072 patients with mild or severe preeclampsia in one or more of their pregnancies and the comparison group included 20742 patients without preeclampsia. Excluded from the study were patients with chronic hypertension and pre-gestational diabetes before the index pregnancy. Data included subsequent hospitalizations in internal medicine, oncology, nephrology, neurology, cardiac intensive care unit, and hematology, as well as a diagnosis of chronic hypertension during the follow-up period. Results: Patients with preeclampsia had significantly higher rates of chronic hypertension diagnosed after the index pregnancy as compared with patients without preeclampsia (12.5% vs. 0.9%; OR = 15.8, 95% CI 12.9–19.3; p < 0.001). Likewise, patients with preeclampsia were more likely to be hospitalized at least once (13.7% vs. 11.4%; OR = 1.2, 95% CI 1.1–1.4; p = 0.002) as compared with patients without preeclampsia. Exposed women had 582 hospitalizations (0.28 hospitalization/patient), while the non-exposed patients had a total of 4687 hospitalizations (0.23 hospitalization/patient; p < 0.001). Conclusion: Preeclampsia is a significant risk factor for long-term morbidity such as chronic hypertension and hospitalizations later in life.

The effect of drug co-payment policy on the purchase of prescription drugs for children with infections in the community

A cross-sectional study was conducted to investigate the influence of the co-payment policy in a community setting on the purchase of prescription medications for children with acute infections. Data for all purchased medications prescribed for children with an acute infectious disease were gathered from a pediatric health care center over a 6-week period. Parents of the sick children and controls were interviewed by telephone, using a short sociodemographic questionnaire, and were asked to state their reasons for not purchasing (either partially or completely) necessary medications, primarily antibiotics. Of the 779 children who received a prescription for antibiotics during the 6-week period, 162 (20.7%) failed to take the complete course of antibiotic treatment. One hundred and one parents of these children (62.3%) were interviewed, of whom 30 (29.7%) claimed that the main reason for not buying the full course of antibiotic medication was the cost. This group is characterized by low income, overcrowded housing conditions and a large quantity of prescription medications. The cost of prescribed medication under the co-payment policy is a serious barrier to the purchase of prescribed medication for children with acute infections in the primary care setting. The policy has a particularly deleterious effect in under-privileged populations and is in contradiction with the proclaimed principles of justice and equality underlying the obligatory Israeli National Israeli Health Insurance Law and similar laws in other western countries.